CN219531788U - Paired plate unit and plate heat exchanger with paired plate unit - Google Patents

Abstract

The utility model discloses a pair of plate units and a plate heat exchanger with the same, wherein the pair of plate units comprises a first heat exchange plate and a second heat exchange plate, and each pair of plate units is provided with a first medium space, a first inlet channel, a first outlet channel, a second inlet channel and a second outlet channel; the first heat exchange plate and the second heat exchange plate are respectively provided with a first through hole and a first through hole, and a first boss and a first sinking table which are oppositely arranged and are in sealing fit connection are respectively arranged at the first heat exchange plate and the second heat exchange plate corresponding to the first through hole and the first through hole; the first heat exchange plate is provided with a first surrounding groove surrounding the first boss; the second heat exchange plate is correspondingly provided with a first surrounding ridge; the first surrounding groove and the first surrounding ridge are matched to form a liquid storage cavity, at least one communication channel is arranged between the pair of plate units corresponding to the liquid storage cavity and the first inlet channel, and the communication channel is a divergent channel with gradually increased flow cross section area in the flowing direction.

Description

Paired plate unit and plate heat exchanger with paired plate unit

Technical Field

The utility model relates to the technical field of heat exchange equipment, in particular to a paired plate unit and a plate heat exchanger with the paired plate unit.

Background

At present, a heat pump refrigerating system mainly adopts a plate heat exchanger as an evaporator and a condenser, so that the heat transfer performance of the plate heat exchanger as a high-performance evaporator and a high-performance condenser is fully utilized, the distribution of a refrigerant in a channel between plates is required to be optimized, the distribution function of a distributor is adopted, the fluid resistance of the heat exchanger is distributed more reasonably, the heat transfer is more effective, and therefore the performance of the heat pump system is better and the energy efficiency is higher.

CN 101868686 discloses a distribution pipe for a heat exchanger, the distribution pipe portion having a plurality of distribution holes provided at positions corresponding to positions of parallel inter-plate channels.

CN109154475 discloses a limiting hole formed by connecting channel space of nozzle structure, said nozzle member is formed by heat-exchanging plate with through-flow cross-sectional area of 1.5-2.5mm on the specific shape area near the corner hole ² Is provided.

CN 109073325 discloses a heat exchanger plate with a flange extending and forming the side wall of the corner hole and implementing at least one limiting hole in the flange portion of the side wall.

CN217110600U discloses a gradually-changed structured communication channel, and when fluid is distributed through the communication channel, the fluid can be gradually changed from shock to quieter, so that the possibility of noise and vibration in the fluid flowing process is effectively prevented, and meanwhile, the flowing local resistance is reduced, so that the system can operate quieter and more efficiently.

Existing corner hole distributors typically have external distributors that extend into the corner hole region or limit holes are implemented in the sheet structure near the corner hole region. However, the existing distribution holes adopt abrupt change channels connected between the corner hole areas and the channels or gradual change channels, and the distributor improves the uniformity of fluid distribution among the channels due to the limitation of the heat exchanger structure, and meanwhile, the space of the distributor at one side of the heat exchange area inside the channels is smaller than the corner hole space due to the compact structure of the heat exchanger, so that the conversion from fluid kinetic energy to pressure potential energy is difficult to effectively realize, the local flow resistance is larger, the uniformity of fluid distribution in the channels is not facilitated, and the space for improvement is provided.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a pair plate unit which can enable the pressure of fluid to be increased to be close to the constant entropy stagnation pressure after the fluid flows through a first communication channel, so that the service pressure of the fluid flowing in a first medium space is effectively improved, the distribution uniformity is effectively improved, and the flow resistance is reduced; and a plate heat exchanger having the above-mentioned paired plate units is provided, which has all the advantages of the above-mentioned paired plate units, and which can ensure a more efficient and smooth operation of the heat exchanger.

In order to achieve the above object, the present utility model provides a pair of plate units, including a first heat exchange plate and a second heat exchange plate connected to the first heat exchange plate in a sealing and butt joint manner, wherein the first heat exchange plate and the second heat exchange plate are corrugated plates having ridges and grooves, a first medium space is formed in the pair of plate units in a supporting and matching manner through the opposite ridges and grooves, and a first inlet channel and a first outlet channel, and a second inlet channel and a second outlet channel, which are communicated with the first medium space, are further arranged on the pair of plate units;

the first heat exchange plate and the second heat exchange plate are respectively provided with a first through hole and a first through hole which are oppositely arranged to form a first inlet channel in a matching way, and a first boss and a first sinking table which are oppositely arranged and are connected in a sealing matching way are respectively arranged at the positions of the first heat exchange plate and the second heat exchange plate corresponding to the first through hole and the first through hole;

the first heat exchange plate is provided with a first surrounding groove which is formed by downward pressing and is used for surrounding the first boss independently or is matched with the edge of the plate body to surround the first boss, and the depth of the first surrounding groove is the same as the depth of the groove part on the first heat exchange plate;

the second heat exchange plate is provided with first surrounding ridges which are formed by upward pressing and are oppositely arranged in the first surrounding grooves, and the height of the first surrounding ridges is the same as that of the ridges on the second heat exchange plate;

the first surrounding grooves and the first surrounding ridges which are arranged oppositely are matched to form a liquid storage cavity, at least one first communication channel is arranged between the liquid storage cavity and the first inlet channel corresponding to the pair of plate units in a constructed mode, and the first communication channel is a gradually-expanding channel with gradually-increased flow cross section area in the flowing direction.

Further provided is that: the first heat exchange plate is provided with at least one first communication groove which is formed by downward pressing and is communicated with the first through hole and the first surrounding groove, and the pressing depth of the first communication groove is smaller than or equal to that of the first surrounding groove;

and/or at least one first communication ridge which is formed by upward pressing and is communicated with the first through hole and the first surrounding ridge is arranged on the second heat exchange plate, and the pressing height of the first communication ridge is smaller than or equal to the pressing height of the first surrounding ridge.

Further provided is that: the volume of the liquid storage cavity is equal to the product of the first through hole area and the thickness of the first heat exchange plate.

Further provided is that: the first medium space comprises a first distribution area, a first confluence area and a first heat exchange area positioned between the first distribution area and the first confluence area, a plurality of first distribution channels are arranged in the first distribution area, a plurality of first heat exchange channels are arranged in the first heat exchange area, and at least one first distribution channel and at least one first heat exchange channel are both communicated with the liquid storage cavity.

Further provided is that: the paired plate units are of rectangular structures, and the first inlet channel, the first outlet channel, the second inlet channel and the second outlet channel are respectively arranged at four corners of the paired plate units.

The utility model also provides a plate heat exchanger which comprises a plurality of paired plate units, wherein the paired plate units are sequentially stacked, and a second medium space is formed between the adjacent paired plate units in a supporting fit mode, and the second inlet channel and the second outlet channel are communicated with the second medium space.

Further provided is that: in the second medium space, the first surrounding ridge on the second heat exchange plate is connected with the first surrounding groove on the opposite first heat exchange plate in a sealing fit manner so as to form an enveloping structure for blocking the first inlet channel from being connected with the second medium space.

Further provided is that: when the plate heat exchanger is used as an evaporator, the first medium space is supplied with refrigerant flow and the second medium space is supplied with water flow.

Compared with the prior art, the paired plate unit has the advantages of simple structure, easy assembly and low manufacturing cost, and can enable the pressure of the fluid flowing through the first communication channel to be increased to be close to the constant entropy stagnation pressure, thereby effectively improving the service pressure of the fluid flowing in the first medium space, effectively improving the distribution uniformity and reducing the flow resistance; the plate heat exchanger with the above-mentioned pair of plate units has the advantage of all the above-mentioned pair of plate units, whereby a more efficient and smooth operation of the heat exchanger can be ensured.

Drawings

Fig. 1 is a schematic perspective view of a pair of plate units according to the present utility model;

fig. 2 is a schematic view of a vertical sectional structure of the paired plate units;

fig. 3 is a schematic perspective view of a first heat exchange plate;

fig. 4 is a schematic perspective view of a second heat exchange plate;

fig. 5 is a schematic view of the separation structure of the plate heat exchanger of the present utility model.

The following reference numerals are attached thereto in combination with the accompanying drawings:

100. a pair of plate units; 101. a first media space; 102. a first inlet passage; 103. a first outlet passage; 104. a second inlet passage; 105. a second outlet passage; 106. a liquid storage chamber; 107. a first communication passage; 1. a first heat exchange plate; 11. a first boss; 111. a first through hole; 12. a second boss; 121. a second through hole; 13. a third boss; 131. a third through hole; 14. a fourth settling platform; 141. a fourth through hole; 15. a first surrounding groove; 16. a first communication groove; 17. a first distribution tank; 18. a first heat exchange tank; 2. a second heat exchange plate; 21. a first sinking stage; 211. a first via; 22. a second sedimentation table; 221. a second via; 23. a third settling platform; 231. a third via; 24. a fourth boss; 241. a fourth via; 25. a first surrounding ridge; 26. a first communication ridge; 200. a plate heat exchanger; 201. a second media space.

Detailed Description

One embodiment of the present utility model will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present utility model is not limited by the embodiment.

The utility model relates to a pair plate unit 100, as shown in fig. 1 and 2, comprising a first heat exchange plate 1 and a second heat exchange plate 2 which is connected above the first heat exchange plate 1 in a sealing and butt joint way by welding, wherein the first heat exchange plate 1 and the second heat exchange plate 2 are corrugated plates with groove parts and ridge parts; the pair of plate units 100 are internally formed with a first medium space 101 by supporting and cooperating a ridge portion on the first heat exchanger plate 1 and a groove portion on the second heat exchanger plate 2, and the pair of plate units 100 are further provided with a first inlet passage 102 and a first outlet passage 103, and a second inlet passage 104 and a second outlet passage 105, which are connected to the first medium space 101.

Specifically, as shown in fig. 1 and 2, the paired plate units 100 are rectangular body structures, and the first inlet channel 102, the first outlet channel 103, the second inlet channel 104 and the second outlet channel 105 are respectively and correspondingly arranged at four corners of the paired plate units 100, preferably the first inlet channel 102 and the first outlet channel 103 are correspondingly arranged at opposite sides of the long sides; further specifically, the first heat exchange plate 1 is a rectangular plate formed by integral stamping, and the four corners of the first heat exchange plate 1 are respectively provided with a first through hole 111, a second through hole 121, a third through hole 131 and a fourth through hole 141, wherein the positions of the first heat exchange plate 1 corresponding to the first through hole 111, the second through hole 121 and the third through hole 131 are respectively provided with a first boss 11, a second boss 12 and a third boss 13 which are raised upwards, and the positions of the first heat exchange plate 1 corresponding to the fourth through hole 141 are respectively provided with a fourth sinking table 14 which is recessed downwards; correspondingly, the second heat exchange plate 2 is also a rectangular plate formed by integral stamping, four corners of the second heat exchange plate 2 are respectively provided with a first through hole 211, a second through hole 121, a third through hole 131 and a fourth through hole 241 which are opposite to the first through hole 111, the second through hole 121, the third through hole 131 and the fourth through hole 141 on the first heat exchange plate 1, wherein the second heat exchange plate 2 is respectively provided with a first sunk table 21, a second sunk table 22 and a third sunk table 23 which are formed by sinking downwards corresponding to the first through hole 211, the second through hole 221 and the third through hole 231, and a fourth boss 24 which is raised upwards corresponding to the fourth through hole 241; when the second heat exchange plate 2 is stacked on the first heat exchange plate 1, the first boss 11 and the first sinking table 21, the second boss 12 and the second sinking table 22 and the third boss 13 and the third sinking table 23 which are oppositely arranged are in sealed welding connection, so that a first water inlet channel formed by matching the first through hole 111 with the first through hole 211, a second water outlet (inlet) channel formed by matching the second through hole 121 with the second through hole 221 and a second water outlet (outlet) channel formed by matching the third through hole 131 with the third through hole 231 are blocked and not communicated with the first medium space 101; the fourth counter 14 and the fourth boss 24 are arranged in a way away from each other, so that a first water outlet channel formed by the fourth through hole 141 and the fourth through hole 241 in a matched manner is communicated with the first medium space 101.

In this embodiment, as shown in fig. 3 and 4, a first surrounding groove 15 formed by pressing downward is provided at the outer edge of the first heat exchange plate 1 corresponding to the first boss 11 and is matched with the edge of the plate body to surround the first boss 11, the first surrounding groove 15 has an arc structure, the pressing depth of the first surrounding groove 15 is the same as the pressing depth of the groove portion on the first heat exchange plate 1, a first communicating groove 16 formed by pressing downward to communicate the first through hole 111 with the first surrounding groove 15 is also provided between the first through hole 111 and the first surrounding groove 15, and the pressing depth of the first communicating groove 16 is the same as the pressing depth of the first surrounding groove 15; the second heat exchange plate 2 is provided with a first surrounding ridge 25 which is formed by upward pressing and is matched with the edge of the plate body to surround the first sinking platform 21, the pressing height of the first surrounding ridge 25 is the same as the pressing height of the ridge on the second heat exchange plate 2, meanwhile, the second heat exchange plate 2 is also provided with a first communicating ridge 26 which is arranged corresponding to the first communicating groove 16 and is formed by upward pressing to communicate the first through hole 211 with the first surrounding ridge 25, and the pressing height of the first communicating ridge 26 is the same as the pressing height of the first surrounding ridge 25; so that the first surrounding groove 15 cooperates with the first surrounding ridge 25 to form a liquid storage chamber 106 located in the first medium space 101, and the first communicating groove 16 cooperates with the first communicating ridge 26 to form a first communicating channel 107 communicating the first inlet channel 102 with the liquid storage chamber 106, so that the first inlet channel 102 communicates with the first medium space 101; meanwhile, the first communication channel 107 is configured and arranged as a diverging channel with a gradually increasing flow cross-sectional area in the flow direction, which in this embodiment is embodied as a gradually increasing width of the first communication groove 16 on the first heat exchanger plate 1 from the first through hole 111 to the first surrounding ridge 25, and a gradually increasing width of the first communication ridge 26 on the second heat exchanger plate 2 from the first through hole 211 to the first surrounding ridge 25.

In the present embodiment, it is preferable that the volume of the liquid storage chamber 106 is equal to the product of the area of the first through hole 111 and the plate thickness of the first heat exchange plate 1, so that the spaces at both ends of the inlet and outlet port where the first communication passage 107 communicates form a pressure equalizing space; the first communication channel 107 is a gradually expanding channel, and the two ends of the channel are pressure equalizing spaces, so that the pressure of the fluid flowing through the first communication channel 107 can be increased to be close to the constant entropy stagnation pressure, thereby effectively improving the service pressure of the fluid flowing in the first medium space 101, reducing the flow resistance, effectively improving the distribution uniformity, and further ensuring that the heat exchanger operates more efficiently and stably.

In this embodiment, as shown in fig. 4, the first medium space 101 of the paired-plate unit 100 includes a first distribution area located at one end of the first inlet channel 102, a first confluence area located at one end of the first outlet channel 103, and a first heat exchange area located between the first distribution area and the first confluence area, where a plurality of first distribution channels are disposed, a plurality of first heat exchange channels are disposed in the first heat exchange area, and a plurality of first confluence channels are disposed in the first confluence area, where at least one first distribution channel and at least one heat exchange channel are both in communication with the liquid storage chamber 106, such that the liquid storage chamber 106 directly communicates with the first distribution area and the first heat exchange area; specifically, a plurality of first distribution grooves 17 are arranged in the first heat exchange plate 1 corresponding to the first distribution areas, and a plurality of first heat exchange grooves 18 are arranged in the first heat exchange areas, and the first surrounding grooves 15 on the first heat exchange plate 1 are communicated with at least one first distribution groove 17 and at least one first heat exchange groove 18.

In other embodiments, the first surrounding groove 15 may be configured and arranged to independently surround the first boss 11, and the first surrounding ridge 25 is also configured and arranged to be annular; the pressing depth of the first communicating groove 16 may be configured to be smaller than the pressing depth of the first surrounding groove 15, and the pressing height of the first communicating ridge 26 may be smaller than the pressing height of the first surrounding ridge 25 as well; meanwhile, as required, two or more first communication channels 107 with divergent structures may be also configured between the first inlet channel 102 and the liquid storage chamber 106; the first communication channel 107 may be formed by matching the first communication groove 16 on the first heat exchange plate 1 with the plate surface of the second heat exchange plate 2 or by matching the first communication ridge 26 on the second heat exchange plate 2 with the plate surface of the first heat exchange plate 1.

The present utility model also provides a plate heat exchanger 200, as shown in fig. 5, the plate heat exchanger 200 includes a plurality of the above-mentioned paired plate units 100, a plurality of paired plate units 100 are stacked in turn and support-fit between adjacent paired plate units 100 to form a sealed second medium channel, wherein the second inlet channel 104 and the second outlet channel 105 are both communicated with the second medium channel to form an inlet and an outlet of the second medium space 201; preferably, in the second medium space 201, the first surrounding ridge on the second heat exchanger plate is in sealing engagement with the first surrounding groove on the opposite first heat exchanger plate 1 to form an envelope structure blocking the connection of the first inlet channel 102 with the second medium space 201, while the first medium space 101 is provided for the flow of refrigerant and the second medium space 201 is provided for the flow of water when the plate heat exchanger 200 is used as an evaporator, so that the heat exchange of the refrigerant with the water before entering the liquid storage chamber 106 is prevented by the envelope structure, thereby ensuring the adiabatic feature of the refrigerant during the diffusion flow.

Compared with the prior art, the paired plate unit has the advantages of simple structure, easy assembly and low manufacturing cost, and can enable the pressure of the fluid flowing through the first communication channel to be increased to be close to the constant entropy stagnation pressure, thereby effectively improving the service pressure of the fluid flowing in the first medium space, effectively improving the distribution uniformity and reducing the flow resistance; the plate heat exchanger with the above-mentioned pair of plate units has the advantage of all the above-mentioned pair of plate units, whereby a more efficient and smooth operation of the heat exchanger can be ensured.

The above disclosure is merely an example of the present utility model, but the present utility model is not limited thereto, and any variations that can be considered by a person skilled in the art should fall within the protection scope of the present utility model.

Claims (8)

1. The pair of plate units is characterized by comprising a first heat exchange plate and a second heat exchange plate which is connected to the first heat exchange plate in a sealing and butt joint mode, wherein the first heat exchange plate and the second heat exchange plate are corrugated plates with ridges and grooves, a first medium space is formed in the pair of plate units through supporting and matching of the opposite ridges and grooves, and a first inlet channel and a first outlet channel which are communicated with the first medium space, and a second inlet channel and a second outlet channel are also formed in the pair of plate units;

the first heat exchange plate and the second heat exchange plate are respectively provided with a first through hole and a first through hole which are oppositely arranged to form a first inlet channel in a matching way, and a first boss and a first sinking table which are oppositely arranged and are connected in a sealing matching way are respectively arranged at the positions of the first heat exchange plate and the second heat exchange plate corresponding to the first through hole and the first through hole;

the first heat exchange plate is provided with a first surrounding groove which is formed by downward pressing and is used for surrounding the first boss independently or is matched with the edge of the plate body to surround the first boss, and the depth of the first surrounding groove is the same as the depth of the groove part on the first heat exchange plate;

the second heat exchange plate is provided with first surrounding ridges which are formed by upward pressing and are oppositely arranged in the first surrounding grooves, and the height of the first surrounding ridges is the same as that of the ridges on the second heat exchange plate;

the first surrounding grooves and the first surrounding ridges which are arranged oppositely are matched to form a liquid storage cavity, at least one first communication channel is arranged between the liquid storage cavity and the first inlet channel corresponding to the pair of plate units in a constructed mode, and the first communication channel is a gradually-expanding channel with gradually-increased flow cross section area in the flowing direction.

2. The pair of plate units according to claim 1, wherein the first heat exchange plate is provided with at least one first communication groove which is formed by pressing downwards and communicates the first through hole with the first surrounding groove, and the pressing depth of the first communication groove is smaller than or equal to the pressing depth of the first surrounding groove;

and/or at least one first communication ridge which is formed by upward pressing and is communicated with the first through hole and the first surrounding ridge is arranged on the second heat exchange plate, and the pressing height of the first communication ridge is smaller than or equal to the pressing height of the first surrounding ridge.

3. A pair of plate units according to claim 1, wherein the volume of the liquid storage chamber is equal to the product of the first through-hole area and the first heat exchanger plate thickness.

4. A paired-plate unit according to claim 1, wherein the first medium space comprises a first distribution area, a first confluence area, and a first heat exchange area between the first distribution area and the first confluence area, wherein a plurality of first distribution channels are arranged in the first distribution area, a plurality of first heat exchange channels are arranged in the first heat exchange area, and at least one first distribution channel and at least one first heat exchange channel are both communicated with the liquid storage chamber.

5. A pair of plate units according to claim 1, characterized in that the pair of plate units has a rectangular body structure, and the first inlet channel, the first outlet channel, the second inlet channel and the second outlet channel are arranged at four corners of the pair of plate units, respectively.

6. A plate heat exchanger comprising a number of plate pairs according to any one of the preceding claims 1-5, a number of said plate pairs being stacked one on top of the other and being supported in cooperation between adjacent plate pairs to form a second medium space, wherein said second inlet and outlet channels are each in communication with the second medium space.

7. A plate heat exchanger according to claim 6, wherein the first surrounding ridge on the second heat exchanger plate is in sealing engagement with the first surrounding groove on the opposite first heat exchanger plate in the second medium space to form an envelope structure blocking the connection of the first inlet channel to the second medium space.

8. A plate heat exchanger according to claim 6, wherein the first medium space is intended for flow of a refrigerant and the second medium space is intended for flow of water when the plate heat exchanger is used as an evaporator.